Riveted and Pin-Connected Joints of Steel and Aluminum Alloys

Development of low alloy steels and high-strength aluminum alloys, and their utilization in structures, have called the attention of engineers to the somewhat lower ductilities of these materials, as compared to carbon steel, and also to their generally higher ratios of yield strength to ultimate strength. Apprehension has been felt that these differences in physical properties would. affect, unfavorably, the distribution of stress in members built of these materials, especially a t connections. This belief is reflected by the fact that, in some instances, organizations responsible for design specifications, both in the United States and abroad, have set an upper limit for the ratio of yield strength to ultimate strength.